countersink

柯林斯英漢雙解大詞典

countersink /ˈkaʊntəˌsɪŋk/

1.V to enlarge the upper part of (a hole) in timber, metal, etc, so that the head of a bolt or screw can be sunk below the surface 把(木材、金屬上的孔)擴大

2.N a tool for countersinking 用於鍃削的工具 (Also called countersink bit) ^[1] 

CSK Countersink 埋頭孔 ; 埋頭 ; 埋頭的

taper countersink 錐面鍃鑽

rose countersink 菊花鑽

machine countersink 機用錐形鍃鑽

Countersink Bits 鍃鑽

splint countersink 鈍角菊花形尖頭板鑽

countersink learn 埋頭鑽

live countersink 鈍角菊花形尖頭板鑽

countersink drill[機] 埋頭鑽 ; 埋頭坫 ; 靜心鑽 ; 中心鑽 ^[1]